*{
    margin: 0;
    padding: 0;
}

#scroll{
       margin: 100px auto;
       width: 1200px;
       height: 470px;
       border: 1px solid #000;
       position: relative;
       overflow: hidden;
}

#scroll > img{
    position: absolute;
    width: 100%;
    height: 100%;
    transition: left 0.7s ease-in-out;
}

#scroll .arrow{
    position: absolute;
    top: 0;
    width: 60px;
    height: 100%;
    color: #fff;
    font-size: 40px;
    text-align: center;
    line-height: 470px;
    cursor: pointer;
}

#scroll .left{
    left: 0;
}

#scroll .right{
    right: 0;
}

.pageControl{
    position: absolute;
    margin-left: -36px;
    left: 50%;
    bottom: 20px;
}

.pageControl .dot{
    float: left;
    margin-right: 10px;
    width: 10px;
    height: 10px;
    border: 2px solid #fff;
    border-radius: 50%;
    cursor: pointer;
}